Improvement in nail-cutting machines



THOMAS M. LAWRENCE.

Improv-e'ment in Nail Cutting Machines.- NO. 122,324. PatentedJan-2,1872.

gamma:

UNITED STATEs THoMAs M. LAUEENoE, OF PI UA,0HI0.

. IMPROVEMENT IN NAIL-CUTTING MACHlNES.

Specification forming part of Letters Patent No. 122,324, dated January 2, 1872.

To all whom it may concern:

Be it known that I, THoMAs M. LAURENCE,

of Piqua, in the county of Miami and State of Ohio, have invented a new and Improved Feed-Mechanism for Nail-Machines; and do hereby declare that the following is a full, clear, and exact description thereof, which will e11- able others skilled in the art to make and use the same, reference being had to the accompanying drawing forming part of this specification. Figure 1 represents a vertical longitudinal section of my improved nail-feeder taken on the line 0 c, Fig. 2. Fig. 2 is a plan or top view of the same. Fig. 3 is a detail transverse section of the same taken on the line 70 k, Fig. 1. Fig. 4 is an end view of the spiral-shouldered cylinder.

Similar letters of reference indicate correspondin g parts.

My invention consists in the improvement of nail-plate feeders, as hereinafter fully described and subsequently pointed out in the claims. I p

A in the drawing represents an inclined table; F F, uprights thereon, in which are bearings for a hollow rotary cylinder, B and G, a block placed against the uprights F F, and alongside said cylinder. The cylinder B is provided with spiral shoulders a a, extending ,half-way round it, and from one upright to the other, and also with short shoulders or ribs l at the front. The block G has a straight guide-channel, a, formed in the face through itswhole length, and next the cylinder, While the upright F has a recess, m, commencing from the inside, but only extending part of the way through it. b is a block which is reciprocated in the guide-channel a and against the shoulders at a in order to give a semi-revolution to the cylinder B. dis a spring-rod, to which the block b is attached at the end, and by which it is reciprocated. H is a guideblock, through which is a horizontal slot of sufficient width to allow consideralble lateral play to the rod d. I is anotherblock, in which are two open grooves, one straight and the other oblique thereto. 0 is the nipper-rod, at Whose end the plate is held, and which it is the object of the above-described device to rotate half-way round after each nail is severed.

but straight on the other.

The mode of operation of my nail-plate turner is as follows: The spring-rod dis pushed forward until theblock b has entered the groove a, when itis raised and forced laterally into the oblique groove of the block I. This brings the block b with an elastic pressure upon the surface of cylinder B. Pushing the said block b to the back of the cylinder, it slips down. from the end thereof into the recess m,- and when the rod d is drawn, passes behind 'a shoulder on the other side of the cylinder. If the rod d is now drawn forward it revolves the cylinder a semi-revolution, and, passing closely between the shoulder and rib, at the front thereof, holds the said cylinder and nipper-rod C, so that the plate is sustained firmly in a horizontal position. E is a plate having teeth inclined backward on the front edge,

This is fastened between the two ends of nipper-rod O C so as-to form the middle thereof, and to be in the same plane with the nail-plate. f is a plate fixed on the table A, and arranged in a plane at an oblique angle to that of the toothed plate E. This constitutes my improved device for drawing back the nail-plate, as it is turned, to enable it to clear the cutter.

The mode of its operation is as follows: As the nipper-rod is turned, the incline of one of the teeth of plate E, being carried against the oblique plate f, draws back said rod a small but sufficient distance to enable ittoturn without obstruction. The upright I is vertically-slotted, and the cylinder B receives the square end of rod 0 in a bearing sufficiently large to allow of a small upward movement, necessary in turning the plate. This elevation is produced in the usualmanner by cams G G on the front end of the nipper-rod and a little way from the nail-plate.

I am aware that a cylinder, in which a nipper-rod is received, and by whose rotation it is turned, is not new; but

Having described all that is necessary to a full understanding of my invention, what I do esteem to be new, and desire to protect by Letters Patent, is-

1. The spring-rod d, sliding block I), block G having straight channel-guide n, cylinder B having spiral shoulders at a, ribs at the front end, and uprights F F, in the former of which PA ENT OEEIcE.

is in recess, m, allconstnuctechramrangrd, and 3. The. subject-matter 0f the, aboveplaims; r app'li'edl together to opera-tel substantially as in; combination with the w-cauns g g a nd stop. a,

and for the purpose specified arranged as and. for the purpose specified.

.2. The combination of the subject-matter 0f V THOMAS M. LAURENCE. above claim with nipper-rodOG, toothedplfit Witnesses: E, and oblique plate f, as and for the purpose 3 L. O. MANNING,

set forth. Jax'GQB-GRUPsIW, J r. (103) 

